Compilare: user.cpp: In function ‘int main()’: user.cpp:36:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&d); ^ user.cpp:38:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^ user.cpp: In function ‘int cauta(int, int)’: user.cpp:27:76: warning: ‘mid’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (mid+1<=n && w[mid+1].first==w[mid].first && w[mid+1].second-w[mid].second<=d) ~~~~~~~^~~~~~